You searched for: “magnetron
magnetron
1. A vacuum tube in which the flow of electrons is manipulated by electric and magnetic fields to generate microwaves.

The microwave radiation produced is either pulsed, for use in radar applications, or continuous, as required for microwave cooking.

2. A diode vacuum tube in which the flow of electrons is controlled by an externally applied magnetic field to generate power at microwave frequencies.
This entry is located in the following units: magnet-, magneto- + (page 3) -tron, -tronic, -tronics + (page 13)